LC
South African Shelduck Tadorna cana



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Average mass 1182 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,160,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
Population trend Increasing suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 10.9 - - -

Trend justification: The overall trend is suspected to be increasing (Wetlands International 2006).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Botswana N Extant
Lesotho N Extant
Namibia N Extant
South Africa N Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
South Africa Barberspan and Leeupan
South Africa Spitskop Dam
South Africa Orange River Mouth Wetlands
South Africa Kamfers Dam
South Africa Verlorenvlei Estuary
South Africa False Bay Nature Reserve
South Africa Cape Whale Coast

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Aquatic & Marine Artificial/Aquatic - Wastewater Treatment Areas suitable non-breeding
Artificial/Aquatic & Marine Artificial/Aquatic - Water Storage Areas (over 8ha) suitable non-breeding
Artificial/Terrestrial Arable Land suitable non-breeding
Grassland Subtropical/Tropical Dry suitable non-breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable breeding
Shrubland Mediterranean-type Shrubby Vegetation suitable non-breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable non-breeding
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) suitable non-breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable breeding
Wetlands (inland) Seasonal/Intermittent Saline, Brackish or Alkaline Lakes and Flats suitable breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Human intrusions & disturbance Recreational activities Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Species disturbance
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Clostridium botulinum Timing Scope Severity Impact
Future Minority (<50%) Rapid Declines Low Impact: 4
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Tadorna ferruginea Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Hybridisation
Natural system modifications Other ecosystem modifications Timing Scope Severity Impact
Future Majority (50-90%) Slow, Significant Declines Low Impact: 4
Stresses
Ecosystem degradation, Reduced reproductive success

Recommended citation
BirdLife International (2022) Species factsheet: Tadorna cana. Downloaded from http://www.birdlife.org on 23/01/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/01/2022.